On the original 4.0 harness, there should be a connector that looks like this

The two middle contacts are the field terminals. They should be connected to two wires, one Dark Green, and one Dark Green w/ Orange stripe. The DG should be Generator Driver (+), and the DG/O should be Generator Driver. If you can figure out which is which, that would be great!

Alright, I took the plastic tubing off the wires and sure enough found a green wire and a green/orange wire

Do I just splice right in to those or should I pull these and connect the wires directly to the post and then wire another wire to the battery? Or could I wire the other (12 volt) wire to the B+ (output) terminal and run that to the solenoid or battery since its a heavier gauge wire?

Also, I have a new question (the hits just keep on coming):

The oil pressure sensor/ sending unit was wired to a connector that combined wires from the alternator and ac compressor. The hesco harness doesn't have a hook up or connection for the oil pressure sensor or the connector that it was previously wired to. How would I wire this up to make sure it works properly?

Would I need to figure out which pin it goes to on the PCM and wire it directly to that?

Do I just splice right in to those or should I pull these and connect the wires directly to the post and then wire another wire to the battery? Or could I wire the other (12 volt) wire to the B+ (output) terminal and run that to the solenoid or battery since its a heavier gauge wire?

On the '98 that I'm working with, both the field wires come from the ECM. On yours, it sounds like you have the right idea. The blue wire should go to whichever terminal had the green/orange wire going to it, and the other should get wired to +12V.

Quote:

The oil pressure sensor/ sending unit was wired to a connector that combined wires from the alternator and ac compressor. The hesco harness doesn't have a hook up or connection for the oil pressure sensor or the connector that it was previously wired to. How would I wire this up to make sure it works properly?

Would I need to figure out which pin it goes to on the PCM and wire it directly to that?

I don't know what the PCM does with the oil pressure signal, if anything. You may want to get a hold of Hesco again to see what they recommend.